Dynamic and fatigue testing systems
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Testing systems Dynamic and fatigue testing systems Intelligent Testing

Contents Page 1 The Zwick Roell Group 2 2.1 Servo-hydraulic testing machines 4 2.3 Electrodynamic testing machines 14 testing machines 2.5 Electromechanical servo- 17 testing actuators 3 Control electronics and testing 18 1 Zwick - passion and expertise For over 160 years the family-owned company Zwick Roell has stood for outstanding technical achievement, innovation, quality and reliability in materials and component testing. Zwick is the world leader in static materials testing; Zwick testing machines are used in R&D and quality assurance in more than 20...

advantages and areas of application, allowing us to find the optimum solution for your testing situation. The strength of servo-hydraulic testing machines lies in the various applications for which they are suitable. In terms of force, amplitude and frequency they are true all-rounders, enabling multi-axis fatigue tests or crash investigations with speeds of up to 20 m/s. Their modular design includes testing systems up to 2,500 kN (even higher in special versions). Vibrophores use an electromagnetic resonance drive to generate dynamic loads, which enables very high testing frequencies, and...

2.1 Servo-hydraulic testing machines up to 2,500 kN The load frames of Zwick servo-hydraulic testing machines have been specially designed to cope with the particular demands of fatigue testing; an example of this is their high level of frame stiffness. Depending on testing requirements and the need for ergonomic working conditions in everyday testing, the testing actuator is mounted either above or below the test area. With the testing actuator mounted in the lower crosshead, the HA range represents the classical servo-hydraulic testing machine as used for determining material properties...

Typical applications for servo-hydraulic testing machines Testiing engine beariings estiing engi e earing tn g T sting ra e asten g Testing rail tie fasteniings stening Test Tests in salline bath st n th h Rubber-metall dampers ubber meta ampers etal m s Te s Tests on asphalt spe sphalt pecimens e 4-point flexure test oi flexu e exu xure Compression tests pressiion ess o Test Tests in temperature chambers sts st empe ure am r m e Test h opt Tes with optical strain measureeas ea ment

HC Series and HC Compact: 10 to 25 kN While the HA and HB models are floor-standing, allowing equipment assembly at an optimum operating height, the HC models (10 to 25 kN) are table-top models and can also be positioned on a workbench, for example. A concrete base can optionally be supplied as a support. With all HC models the actuator is positioned above the test area, which is equipped with a T-slotted platform. A special feature of the HC series is the HC Compact. In this model the hydraulic power-pack acts as the machine table, reducing the system footprint to a minimum. With a flow rate...

HCT and HBT series for combined tensile, compression and torsion loading HCT/HBT are variations of the proven HC/HB series, equipped with a combined servo-hydraulic linear drive for superimposed tensile-compression-torsion loading on standardized specimens or components. In addition to axial stiffness, the frames feature high torsional stiffness. The set values for the linear and rotary drives can be configured independently of each other with freely adjustable phasing. The drive unit is mounted on the upper crosshead and the frame is equipped with an integral T-slotted platform, enabling...

Special solutions In addition to standardized systems, Zwick also designs and produces special dynamic testing systems. multi-axis systems, combined tension-torsion systems, testing systems with various media environments and large-scale testing systems all form part of our product portfolio. Fig. 2: Four-column HB250 f0r materials and component testing Fig. 1: Movable servo-hydraulic portal frame for component testing Fig. 3: Servo-hydraulic portal frame for testing aircraft components

Accessories for servo-hydraulic testing machines The final element in our dynamic testing product range is the manufacture of all the necessary accessories. Our portfolio is constantly being expanded through a program of continuous development and the inclusion of new products, allowing us to satisfy our customers' most demanding quality requirements while continually improving the quality of our products. Hy raulic parall Hydrau pa lllell griips a llel ps Hy r u wed grips Hydrauliic wedge grips edg grip dge p F exur es t Flexure test kits ur re H g t mpera High-temaceature furpera u np na e...

2.2 Vibrophores Due to their design, Vibrophores have, in the past, been used exclusively as dynamic materials testing machines for determining the fatigue strength of materials and components with regard to fatigue life and fatigue limit, for example in fatigue tests to DIN 50100 (S-N curve), in the tensile, compression, pulsating load and alternating load ranges. Modern laboratories and institutes, whether in research, training or industry, are increasingly confronted with frequently changing testing requirements. The latest generation of Vibrophores (high-frequency pulsators) from Zwick...

The testXpert Research software provides intuitive test definition, performance and evaluation. Typical applications include fatigue tests on standard specimens, fatigue tests on components, fracture mechanics investigations on CT and SEB specimens (e.g. connecting rods, crankshafts and threaded connectors). The Vibrophore can also perform production monitoring and quality control of testing components which are subjected to oscillating loads in service, such as concretereinforcing steel and rebars. Static tests using the Zwick Vibrophore Mechanical clamping of the oscillating crosshead and...

In combination with precision crosshead guidance, the Vibrophore minimizes unacceptable mechanical influences on the specimen. By using suitable accessories, both static and dynamic tests can be performed under various environmental conditions (temperature, aggressive media). The Vibrophore can also be configured for torsion and flexure tests. The absence of a central lead screw allows maximum test-area variability on the new Vibrophore, enabling testing of both very short and very large components. Fig. 2: Installation of makroXtens extensometer (top) and clip-on extensometer (bottom) for...